Retnosari, Lili, and Nasrudin . “TRADE COMPLEMENTARITY DAN EXPORT SIMILARITY SERTA PENGARUHNYA TERHADAP EKSPOR INDONESIA KE NEGARA-NEGARA ANGGOTA OKI”. Buletin Ilmiah Litbang Perdagangan, vol. 12, no. 1, July 2018, pp. 21-46, https://jurnal.kemendag.go.id/index.php/bilp/article/view/281.